Stability Analysis And Controller Design Of Networked Control System Based On Multiple-Packet Transmission

Multiple-packet transmission problem of the networked control system as a theoretical and technical issues,got the wide attention of scholars both here and abroad,and has achieved fruitful results.Due to networked control system adopts the way of multiple packet transmis-sion,it will be affected by factors such as network-induced delay and date packet dropout,these factors can degrade the performance of the system and even impact on the stability of closed-loop system.Therefore,this paper based on asynchronous dynamical system theory and Lyapunov stability theory,the linear matrix inequality and Schur lemma as the main means of processing,studied for the problem of modeling,exponential stability and controller design of dynamic output feedback of networked control system with multiple-packet trans-mission(MNCS).At the same time,in the actual MNCS,not only can MNCS run stability,but also MNCS required to meet certain performance indicators.So,this paper further study on the guaranteed cost control problem of MNCS on the basis of the research on the stability of system.This thesis is organized as follows.Firstly,this paper introduces the research background and significance of this topic,reviews and summarizes the fundamental issues and research status of networked control system.Then this paper introduces some prepare knowledge,such as important theories,main lemma,and so on.They lay a theoretical foundation for the research of full papers.Secondly,the problem of multiple-packet transmission,uncertain delay and data packet dropout which exist both between sensor and controller and between controller and actuator in networked control systems is investigated.Suppose that the data of sensor nodes are transferred with static scheduling strategy.MNCS is modeled as an asynchronous dynamical system constrained by event rates.Based on dynamic output feedback control strategy and stability criteria of asynchronous dynamical system theory,semi-negative definite matrix conditions of asymptotic stability for the networked control system with multiple-packet transmission are obtained by using appropriate Lyapunov functions.A controller design approach is given in terms of LMI.Using MATLAB to validate the conclusion,illustrate the correctness of the conclusion.Thirdly,dynamic output feedback guaranteed cost control for networked control system with multiple-packet transmission and uncertain time delay is researched.On the premise of the system satisfying the asymptotic stability,the sufficient condition of the existence of guaranteed cost control law and the corresponding guaranteed cost upper bound of the system were deduced.Based on the performance index proposed by the system model,using Lya-punov stability theory and LMI approach,we got a guaranteed cost control law by choosing a suitable Lyapunov function.Numerical example illustrates the effectiveness of this method for the guaranteed cost control law.Finally,the summary of the paper and the vision on the further study of networked control system with multiple-packet transmission were presented.